Stove



' a stove, which may be of any suitablev form or` Patented ct. 16, 19.2.8.

UNITEnsTATl-:s

HENRY IB. DE CAN, ST.` MARIES, IDAHO.

srovn.

Application sie@ :rune 3o, v1927, serial No. 202,641. VRenewed my 2e, 192s.`

This invention relates to stoves, and par` ticularly to that class of stoves having a hot air pipe extending through the stove andV opening below the stove for the inlet of cool air and an opening above the stove for the outlet of warm air.

The general object of my invention is to improve the construction of the class d e. scribed by the provision of means whereby the air entering the air pipe will not be immediately subjected to intense heat but that theV air pipe will be highly heated around its upper portion to thus secure a much better upward draft of air than is possible where the heat is applied at the lower end of the air pipe. A further kobject is to "provide a stove of this charactervhaving'a fire box and grate, the grate being so constructed. as to carry relatively cool aii` to an air space or chamber surrounding the lower portion of the air pipe so as to keep this lower portion of the air. pipe relatively cool. Y

Other-objects -will appear in the course of the following description.

My invention is illustrated in the accompanying drawing, wherein fi Figure 1 is a klong gitudinal vertical'sectional view of a stove constructed in accordance with my invention; f l

Figure. 2 is a section on the line 2-K-2 of Figure 1; v .Y

Figure 3 is a fragmentary section on the line 8-3 of Figure 1;

Referring to these drawings, 10 designates construction and which may be of cast iron, sheet iron or of any other suitable material. I have illustrated this stove as being relatively elongated horizontally and provided at its rear end with the flue 13. A grate eX- tends longitudinally across'the stove and divides the fire space 14 of the stove from the ash space 15. This grate preferably consists of three parts, a central oscillatable, rotatable grate bar 16, which is preferably cylindrical and opens at its forward end upon the front of the stove and constitutes a fresh air duct, and the lateral grate bars 17 which are Hat. These flat grate bars 17 may have openings therethrough of any desired shape and these grate bars maybe either fixed in vplace or oscillatably mounted. The cylindrical grate bar 16 is hollow to provide an air duct, as previously stated, and is formed with outstanding' fins or lugs so that as this cylin- I 1,687,972 PATENTorifice.

drical grate bar is oscillated the fuel will be 'l dislodged and shaken and if-suiicient oscillation is given tothe grate bar, the 'burned y coals may be thrown over upon the grate barsV 17 permitting the stove to bedumped. y n The grate bars16 and 17 attheir rear'ends are supported upon a transverselyu extending wall 18 by means of'a gudgeon'19 of any'suit-A l able construction entering a bearingV opening in"` said wall. The Wall18 forms the vfront. wall Aof anair chamber 20, the front wall 18 of this air chamber extending upwardfroxnA the bottom of the stove to a distance above the grate bars, and the top of the air: chamber.

being formed by the wall 21 vwhichis shownV Y. vas apertured. The front wall 18 is formed with apertures 18a which areinalignment with the hollow or tubular grate bar 1 6, and v ber 20, through the top 21 vand through the top of the stove is ythe air pipe 22 which extends below they bottom of the stove andv eX- tends to any desired height above the Vtop of the stove and is supported 'infanydesued manner as, for instance, byv flanges 23 formed upon the air pipe 22 and resting upon the bot'- tom of the stove. This air pipe 22 is preferably, though not necessarily,.semi-circularin cross section and the wall of thisv pipe may be formed by the end wall'of the stove'if desired, though I do not wish to limit myself to this. The object of this air pipe 22 is to carry the air of lower temperature adjacent the floor upward through the stove and dis#y charge the warmer air near the ceiling of the room. The heat of the fire in the stove will cause a draft or air current inthe cold air pipe that will draw the air from the floor and carry it through the air pipe and cause a constant circulation of air to thereby cause the ber 20, as I have found in actual practice that if the lower portion of the pipe is highly heated, warmer airtends to escape at the lower portion of the pipe and not at the top Vthe air Chamber terininatinoy short As shown in Figure l, the back wall oit the stove is provided with an openinoiQL disposed `slightly above the adj acent end of the hollow or tubular grate `1G and communicating with the interior of the air chamber 20. Air enters the front end oit thecylindrical grate bar 1G and passes back through this grate bar and through the openings 18LL into the chaiiiiber 20 and then out through the opening` Vithout this opening 24, the air would enter the chamber i8y and become dead and there would be no circulation. This structure provides a connecting linlr, as it may be called, between the cold air draft and the grate, as the air passing around the lower end of the pipe 22 and going out through the opening 24- tend-s to keep the cold air pipe cooler atA the lower end and thus secures a better circulation of the air in the room.

It is also to be understood that I do notwish to limit myseljr' to any particular torni of stove nor to the details illustrated, as these may be varied in many ways without departing from the spirit oi? the invention as defined in the appended claims.

I claiin:-

.1. A stove of the character described having an air chamber adjacent its rear end' and an air pipe extending upwardtliiough the bottom or' vthe stove and through said air chamber and through the topof the stove, of the top ofthe stove to permit products of combustion to pass around the upper portion of the air pipe.

2. A stove of the character described having therein an air chamber extending upward through the bottom ofthe stove and termi nating short of' the top of the st0ve,fthe stove having a flue extending frointhe stove above the air chamber, and an airpipe open at its upper end and extending vertically through ,the stove and having its lower portion disposed within said air chamber.

3. A stove of the character' described having an air chamber at its rear end having a front wall extending upward from the bottom of the stove and a top wall extending from the rear wall of the stoveA to the front wall of the air chamber, grate bars extending longitudinally from the front wall ot the stove toj the front wall oi the air chamber to provide a iire spaceV above the grate bars and anasli pit below the grate bars,7said air chambercxtending above the grate bars, a cool air duct extending from the front of the stove beneathA the lire space and opening-into'said air chambeigia iiue extending from the top of the stove abovel the air chamber, and a cool air pipe extendingV vertically through the stove and projecting beyond the top and bottom of the stove and' being' open at its opposite ends, the lower portion disposed within said air chamber.

4. ln a stove of the character described having an air chamber at the rear end of the stove, the air Chamber being less in height than the height ot the stove and having a front wall and a top wall, a grate extending from the front wall of the stove to'the front wall of the air chamber and comprising a plurality of grate bars, one of said bars being in the torni or' a hollow cylinder opening atits front end upon the front of the stove and at its rear end into the air chamber,` a. flue ex u tending from the stove at a point-*above the air chamber, and an air pipe extending vertically through the stove and projecting below the bottom of the stove and above the top thereof and open at its ends, the lower por-v tion of thel air pipe being disposed within the air chamber.v 1

In testimony whereof I hereunto afiixv iny signature. Y

HENRY i3. DE CAN.

ot said pipe being 

